Oscillating vane rotary pump



Feb. 8, 1949. J. o. HAMREN 2,460,821

7 OSCILLATING VANE ROTARY PUMP Filed Sept. 3, 1942 3 Sheets-Sheet 1INVENTOR.

HTTVFIYE) Joana/0. flan rm Feb. '8, 1949. o, HAMREN OSCILLA'IING VANEROTARY PUMP Filed Sept. 5, 1942 3 Sheets-Sheet 2 Feb. 8, 1949. J. o.HAMREN OSCILLATING VANE ROTARY PUMP Filed Se t. 3, 1942 3 Sheets-Sheet 3N R 5 -MW H WW H W Z;

Patented Feb. 8, 1949 UNITED STATES PATENT OFFICE.

2,480,821 v oscnlm'rme vans ao'raar rum, Joseph 0. Hamren, Minneapolis.Minn.

Application September 3, 1942, SerialNo. 457,129

cient, and one in which the discharge can be regulated to vary thetorque effort of the pump.

It is a further object of the invention to provide a pump having astator in the form of a cam having a chamber therein with which the 1inlet of the pump communicates, said cam having openings at oppositesides thereof and a rotor comprising a plurality of circumferentlallyarranged swinging vanes having free ends with 2 casing secured withinsaid casing, said ,nrst mentioned casing forming a chamber about saidinner casing and having inlet chambers at the end por tions thereof,said inner casing having an inner 5 cylindrical wall, cam memberssecured in said inner casing having chambers therein extending aboutsaid shaft with openingsat opposite sides thereof, said chamberscommunicating with said inlet chambers, a rotor secured to said shafthaving a central disk-like portion extending between said cams to thewall of said inner casing, a multiplicity of pins carried in the outerportion of said disk-like portion and projecting from opposite sidesthereof parallel to said shaft} a swinging surfaces adapted to rotate inengagement with Vane mounted on each of Said D1118 a ing a free saidcam, said vanes being closely surrounded by a casing having a dischargeopening therethrough together with means for rotating said rotor withthe free ends of said vane advancing.

end with aconvex surface adapted to ride on its respective cam in therotation of said rotor, said inner casing having discharge openingstherethrough equal in number to the number of open- It is another objectof the invention to provide ings thmugh said cm and means 7 a pump asset forth in the preceding paragraph together with means for variablyrestricting said openings through said cam member to vary the torque orrotative efiort or turning moment of said pump.

It is more specifically an object of the invention to provide a pumpcomprising an outer casing, a shaft Journalled in and extending throughsaid casing, said casing having an inlet chamber at one end thereof, aninner casing secured in said casing having a cylindrical inner wall, acam member within said inner casing having a chamber therein andextending about said shaft, said cam member having openings at oppositesides thereof, a rotor secured to said shaft having a disk-like portionextending to the wall of said inner casing, a multiplicity of swingingvanes carried on said disk-like portion having free ends with curvedsurfaces adapted to rotate in engagement with said cam and having hubportions substantially engaging the wall of said inner casing, saidchamber within said cam communicating with said inlet chamber of saidfirst mentioned casing, said first mentioned casing forming a chamberabout said inner casing and said inner casing having openings equal innumber to the openings through said cam leading to said last mentionedchamber together with means for rotating said rotor with the free endsof said vanes advancing.

It is still further an object of the invention to provide a pump as setforth in the preceding paragraph with movable members in the openingsthrough said cam member and means operable from the outer side of saidfirst mentioned casing 55 ing through said casing. An oil ring orpacking for moving said members to variably restrict said openings.

It is also an oblect of the invention to provide a pump comprising acasing,-a-shaft Journalled in and extending through-sai-d casing, aninner 60 25 paragraph with movable members in the openings through saidcam members and means operable from the outer side of said firstmentioned casing for moving said last mentioned members to variablyrestrict, said openings through said cam members to vary the torque orrotative effort or turning moment of said pump.

These and other objects and advantages of the invention will be fullysetforth in the following description made in connection with theaccompanying drawings in which like reference characters refer tosimilar parts throughout the several views and in which:

Fig. 1 is a view for the most part in centralvertical section throughsaid pump and-a portion 40 of a transmission unit connected thereto, the

other portion of said unit being shown in side elevation;

Fig. 2 is a vertical section taken on line 2 -2 of Fig. 1 as indicatedby the arrows;

Fig. 3 is a partial vertical section taken on line H of Fig. 2; and

Fig. 4 is a vertical section taken on 'lii'le'H of Fig. 1 as indicatedby the arrows." H

Referring to the drawings, a pump 'is shown comprising an'outer casingill havingjend members lla and llb having flanges secured to a centraland generally cylindrical portion llc. Portions Illa and "lb havesecured therein ball bearings H in which is journalled a shaft l2extendpinsll.

are eccentric tothe axis of shaft".

posed in each of the end members Illa and lb and secured by screws l6having heads countersunk in said plates. End members Illa and lb aresecured to the central portion ||lc by circumferentially spaced headedbolts i'l and'said' end members have chambers "Id and llle therein whichconstitute the inlet chambers for said pump. It will be noted that endmembers la and lb have openings l leading from chambers Id and Weinwardly. Casing III at opposite sides has bosses my and lllv to whichare secured connecting members I8 and I8 forming the discharge membersor conduits into which the discharge conduits will be suitablyconnected. Passages "In and IM extend through bosses lllg, said passagestapering inwardly. a

End members I00. and Nb are rabbeted at their inner ends to form flangesabout which extends the cylindrical wall 20a of an inner casing 20',said member 20a. being secured by dowel End plates 20b of saidinner-casing which are 'of annular form, fit within member 20a'and aresecured thereto by the circumferentially spaced screws 22, having theirends countersunk in member 2041. Member 20a has a cylindrical innerwall. A rotor 24 has a hub securedvto shaft II by a plurality ofcircumferentially-spaced keys 25 and a disk-like portion 24a extendscentrally from said rotor to the inner wall of member 20a. Spacermembers 23'are disposed on shaft I! at each end of the hub of membersecured to each end plate 201) so that they are disposed at each side ofdisk-like portion 24a and in engagement .with the latter. End I members20b are recessed to receive flanges on cam members 21 and said cammembers are respectively secured to said end plates by the headed bolts28 having their heads countersunk in said cam members. Cam members 21have chambers therein, which chambers are open at their outer ends, theopenings in said outer ends being aligned with the openings in said endplates 20b and the openings in the latter communicate with the openingsor passages I09 so that there is a passage from the inlet chambers Mdand We respectively into the cams 21. Cam members 21 have openings 21aat opposite sides thereofand while the-number of these openings may bevaried, in the embodiment of the invention illustratedsaidopenings areshown as four in number. It will be noted as shown in Fig. 4,

that said cams have outer surfaces 21b which The disklike portion 240.has secured therein adjacent fits periphery a multiplicity of pins 30.Pins 30 are circumferentially spaced and project at opposite sides; ofportion 24a having their axes parallel to the axis'of shaft l2 and thepins at opposite sides of disk 24a. are arranged in staggered relation.Pins 36 have their ends threaded the side of portion 24a. Journalled oneach pin 38 including the portion 38a, is a vane 3|. Each vane has-a hubportionextending about pin30, .which hubgportion is in substantialengagement with theinner wallof member 20a. Said vanes I have free-endsand these are provided with convex surfaces 3| a-which are adapted torotate in tially spaced screws 33, said rings 32 being disposed in andadapted to rotate in annular grooves in the end plates 24b. The openings21a in cam members 21 are formed in part of semi-cylindrical form' andvalves 35 are disposed in said openings extending lengthwise of cammembers 21., Each plate or valve 35 is carried on a shaft 36 and issecured thereto by the spaced screws 34 as shown in Fig. 3. Shafts 36are journalled in the end membersflb and at the outer side of said endmembers have secured thereto arms 31. While these arms may be secured inany manner, they are illustrated as secured by pins 38a. Arms '31incline outwardly through the passages Illf'and at their outer ends arebifurcated to embrace a ring 38 to which they are pivotally connected bya headed pin 39 held in place by a cotter pin 40. Ring 38 has inwardlyprojecting arms 38c adapted to engage and ride upon the hub of end plate|0b which contains the bearing The ring 38 is provided at one portion,shown as the upper portion thereof, with rack teeth 38b and these areengaged by a pinion or teeth 4|a formed on the lower end of a shaft 4|which extends upwardly and is journalled in the end plate of easing In.It will be understood that there are two rings 38 and one shaft 4| isjournalled in end plate Illa and the other shaft-4| is journalled in endplate lob. End plate la is recessed to receive. a collar 42 having aconicalrecess in its upper endand packing material 43 is disposed aboutareduced portion of shaft 4| and engaged at its upper end by a gland 44,the top of which contacts an arm 45 secured to shaft 4| and-held inplace by a castle nut 46 threaded on the -upper end of shaft 4|. Asimilar construction and arrangement of the same parts is shown forshaft 4| in end plate lob, which shaft has an arm 41 secured thereto. It

'. will be seen that by rotating the arms 45 and 41 that shaft 4| willbe rotated and rings 38 will be moved about their axes to swing arms 31,thus turning shafts 36 and moving plates 35 about longitudinal axes tomore or less restrict the openings 21a. The outer ends of shafts 36 arealso journalled in the hubs of the end plates |0a and lb, said hubsbeing provided'with circumferentially spaced bosses I01 bored to receivesaid shafts.

The end members "la. and lllb are provided with circumferentially spacedholes or passages ||llc whichcommunicate with the chambers Id and werespectively. A sleeve 50 is provided which closely fits on and isrotatable on the outer cylindrical surface of casing portion 20a.

Said sleeve has flanges 50a at each end and these fit against the innersides of end members Illa and lb respectively; It will be noted that theouter casing portion Hlc extends about sleeve 50 and forms a chamberlllm thereabout. Flanges 50a are'provided with circumferentially spacedholes or passages 5% adapted to be brought into and out of register withpassages or holes |0k. Theinne'r casing member 26a has openings orpassages 20d therethrough, one being shown for each of the cam openings21a and openings 20d are thus four in number and circumferentiallyspaced equally about member 20a. The sleeve 50 has openings or passages50d registering with the passages 20d and of suflicient 5. lengthcircumierentially so that they will always register with passages lid inthe rotation or oscillation of said sleeve. Sleeve II is adapted to beoscillated and for this purpose has secured thereto at its outer side inchamber llm a rack ll. Rack II is engaged by a pinion ll secured to theinner end of a shaft I! extending outwardly through a boss Iln on casingmember lie to the outer end of which is secured an arm I4. Arm It aswell as arms 45 and 41, are shown as having bifurcated and transverselybored outer ends adapted to be connected to a suitable control member orlever. Boss iln is bored and an oil packing ring I is disposed at thebottom of said bore about shaft II, the same being surmounted by acollar ll having a conical upper-surface and packing material 81 isdisposed in said member 56 about shaft 83 and is engaged by a glandmember 58 which is in turn engaged at its upper end by the hub of arm54. A nut 59 shown as of the castle type is shown as threaded on theupper end of shaft 53 and holds arm It in place. Sleeve has secured toits end flange in any suitable manner as by welding a plate ill movablein contact with the inner cylindrical wall of portion Me and adapted tobe moved over the,

inner end of passage iflh to more orless close said passage. A plate 6|at the opposite side of member lilo is also secured to sleeve 50 as isplate 60 and has an opening or slot la at its central portion. Plate iiis arranged to be moved more or less over the inner end of passage Mi assleeve 50 is moved to more or less restrict passage lli.

The casing Ill has an inlet passage or chamber ifip shown as at itslower end and this communicates through the passages ilq at the endsthereof with the inlet chambers lld and we respectively. The chamber tipis shown as in communication with a passage I01 formed in a portion 65aof a, casing member 65 of a transmission unit. Said casing it isillustrated as secured to the casing ill and specifically to member Weby the spaced headed and nutted bolts 66.

The pump and the transmission unit in casing 65 thus constitute onestructural assembly. It will of course, be understood that the pumpcould be separate and used for other purposes than that of supplying afluid or liquid ,to said transmission unit. Said transmission unit is ofthe type disclosed and claimed in applicant's co-pending application S.N. 376,626, flied January 31, 1941, now issued as Patent No. 2,404,229,granted July 16, 1946 and the same comprises a cam member I it and vanesll carried on a rotor. which rotor is disposed within the inner casing12. It is believed that further description of the transmission unitwill'be unnecessary.

In operation, fluid or liquid will be supplied to the inlet chamber iflpin any suitable manner as from the return passage ibr from saidtransmission unit and this liquid will pass through passages liiq to theinlet chambers lid and lie. The liquid will thenpass through passagesii! and cams El to the inner side of cams 21.1 Shaft Q! will be drivenin any suitable manner and this will rotate the rotor 2d. The rotor isrotated in a direction so that the free ends of the vanes 3i willadvance, which directiozr is indicated bythe arrows in Fig. 4. As thevanes are carried about, their surfaces 38a ride on the cam surfaces27-h and the position of the vanes is changed as shown in Fig. 4. Thevanes pass the openings 21a and as shown at the upper left hand cornerof Fig.

it will be seen that the chamber between the periphery of the cam andthe two vanes in contact is quite small. As the rotor advances thepositions of the vanes change so that the chamber between the vanes isenlarged. This causes a suction which draws the liquid from the innerside of cam members 21 through openings Ila-into the chamber betweensaid cam members and casing 2B. As the rotor continues to revolve, theenlarged chamber between vanes II is again reduced as the vanes pass theopenings Ilid and the fluid is forced out through the openings Ild'andthrough openings [id in sleeve ll into the chamber between sleeve II andthe outer casing II. From this chamber it passes through passages lOh orl0! to discharge members I. and II. with the members or plates 35 in theposition shown in Fig. 4, the pump can deliver its maximum of fluid orliquid. The amount of liquid handled can be reduced by moving theplates35 and this can be done by oscillating arms I! and 41 to oscillateshafts ll causing the toothed portions lid to rotate ring 38 and swingarms 31, thus oscillating shafts 36 and plates 35. By reducing theamount of fluid or liquid passing through the pump or the cam members 21the torque eflort of the pump can be increased. The sleeve Bl can berotated or oscillated on casing member. 20a by swinging arm 54. Thisrotates shalt SI and pinion 5! acts on rack 5| causing rotation ofsleeve 50. When the pump is delivering fluid the openings or passagesllik and "b are out of alignment as indicated in Fig. 4. At this timeordinarily one of the passages "h and iii is closed with passage iii andopen the latter. With the construction of plates t0 and 8| shown bothpassages I02 and illh may be partly open. Fluid could then be dischargedthrough both outlets I! and IS. The sleeve can be oscillated to bringpassages 50b and "Us into register and at this time passages Hill andllli are both closed. The fluid would then merely be bypassed fromchamber Him-through passages 50b and llik into the inlet chambers We and"Id and would be moved again through the cam members 21 and dischargedthrough openings 20d and 80d into chamber Him. The fluid would thuscirculate idly in the pump.

, stated, thechange in position of'vanes 3| causes through the inneropenings of end plates 20b and 2- From the above description it will beseen that I have provided a simple and eflicient rotary pump and one inwhich the driving shaft is concentric with the wall ofthe pump casing.As

a change in thevolume of the chambers there between giving the pumpingaction and the pumping action may also be increased by a centrifugalaction of vanes it as the rotor rotates at highspeed. The pump iscapable of pumping any kind of fluid and will be particularly useful inpumping fluid such as oil. The structure is very compact and easilymaintained. There will be an oil fllm on the inner wall of casingportion filo and also on cam member 21 so that with these portions madeof hard material there will be little wear. It will be obvious that thedevice will have a high degree of utility for the purpose intended.

It will of course, be understood that various changes may be made in theform, details, arrangement and proportions of the parts, withoutdeparting from the scope of applicant's invention, which meaty stated,consists in a device capable of carrying out the objects above setforth, in --the parts 'and combinations of Parts disclosed and .deflnedin the appended, claims.

I, What is claimed is:

1. A pump having in combination, a casing having an inlet chambertherein, a shaft iournailed-in and extending through said casing, a

cem member surrounding said shaft and having achamber thereincommunicating with said inlet chamber and adapted to receivefiuidthereirom, a rotor in said casing secured to said shaft andcomprising -a plurality of swinging vanes carried thereon,- each 'vanehaving a free end with a surface adapted to rotate in engagement withsaid cam-memben said cam member having a plural ity of equally andcircumferentlally spaced open-- ingstherethrough, an inner casingclosely sursaid outlet chamber equal in number to the openings. throughsaid cam member, a valve member disposedin each of said openings throughsaid cam member adapted to be oscillated for variably restricting saidopenings through said cam member to vary the torque of said pump, pivotmembers secured to said valve members, arms a iourn'aled inand extendingthro sh said casing, a second casing secured in saidfirst mentionedcasing and spaced from the wall of said first mentioned. casing to forma discharge chamber between said casings. a rotor in said second casinghaving a hub secured to said shaft and having a disk-like portionextending to the wall of said second casing, a cam member at each sideof said disk-like portion,-each cam member having a chamber thereinsurrounding said hub, communicating with said inlet chambersrespectively and having a plurality of circumferentially andequallyspaced openings therethrough from said secured to said pivotmembers, a ring secured to said arms and rotatable for swinging saidarms and means at the outer side of said first mentioned casing forrotating said ring.

2. A pump having in combination, a casing having inlet chambers thereinat its ends, a shaft iournalled in and extending through said casing,

asecond casing secured in said first mentioned casing and spaced fromthewall of said first mentioned casing to form a discharge chamberthereabout, a rotor in said second'casing having a hub secured to saidshaft and having a disklike portion extendingto the wall'of said secondcasing, a cam member at each side of said disk like portion, each cammember having a chamber therein surrounding said hub, communicating withsaid inlet chambers respectivel and having a plurality ofcircumferentially and equally spaced openings therethrough from saidchamber therein into said second casing, a plu-' rality of-swingingvanes carried by said disk-like portion, said vanes being equally andcircumferentially spaced at each side of said disk-like portion andhaving free ends with convex surfaces adapted to rotate in engagementwith said cam members respectively, said second casing havinn equallyand circumferentially spaced openings equal innumber to the openings ineach of said cam members leading to said: discharge chamber, a valvemember disposed in each of said openings through said cam members andadapted to be'oscillated for variably restricting said openings throughsaid cam members to vary the torque of said pump, pivot members securedto said valve members, arms secured to said pivot members, aring at eachend of said casing secured to said arms connected to the valve membersof each cam member respectively, said rings being rotatable for swinginsaid arms and moving said valve members and means at. the outer side ofsaid first mentioned casing for rotating said'rings. 3. A pump having incombination, a. casing having inlet. chambers therein at its ends, ashaft chamber therein into said second casing. a plu-' rality-ofswinging vanes carried by said disk-like portion, said: vanes beingequally 'and circumfe'rentially' spaced at each side of said disk-likeportion and having free ends withconvex surfaces adapted to rotate'inengagement with the periphery of said cam members respectively, saidsecond casing having equally and circumferentially spaced openings equalin number to the openings in each of said cam members leading to saiddischarge chamber, a valve disposed in each of said openings in said cammembers and adapted to be oscillated for variably restricting said lastmentioned openings ,*pivo't members secured to said valve members, armssecured to said pivot members. a ring at each end of said casing securedto saidqarms connected to the valve members of each cam memberrespectively, said rings being rotatable fo'r'swinging said arms, saidrings having teeth formed; thereon, a pinion respectively meshing withthe teeth on each of said rings, shafts-secured to' said pinionsrespectively and Journaledin said first mentioned casing and extendingto the outer side-thereof and means secured tosaid last mentioned shaftsrespectively for turning the same and said pinions and rings 40 andoperating said valves to vary the torque eifortof said pump.

.4. 'A pumphaving in combination, a casing, a shaft iournaled in andextending through said casing, a cam member surrounding said shaft andhaving a chambe'r'therein' adapted to receive fluid, a rotor in saidcasing secured to said shaft and comprising -a plurality; of swingingvanes carried thereon; each vane having a free end .v'vitha surfaceadapted to rotate in engage- 'ment with saidcam, said cammember havingopenings therethrough at-opposite sides thereof, a second casing closelysurrounding said vanes and having circumferentially spaced dischargeopenings therethrough said second casing forming a-chamber about saidcam member adapted to receive fluid through said openings in said cammember, said first mentioned casing having an outlet chamber extendingabout said second casing to form a discharge chamber adapted to receivefluid through said discharge openings and having an inlet chambercommunicating with the chamber in said cammember, a valve memberdisposed in each of said openings through said cam member adapted to beoscillated for variably restricting said openings through said cammember, pivot members secured to said valve members, arms respectivelysecured to said pivot membars, a ring at the end of said casing securedto and said pinion, rotating said ring and operating said valves to varythe torque of said pump.

JOSEPH O. HAMIREN.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date Wiechmann Dec. 30, 1902 ThomsonJuly 7, 1903 Pratt Sept. 1, 1908 Hughes Jan. 11, 1910 Number NumberFrance Nov. 26, 1923

